Tie-tamper front-end construction



F. A. JIMERSON TIE TAMPER FRONT END CONSTRUCTION Filed Nov. 9, 1920 Patented den. 22, W24;

EPER. FRONT- Application filed November 1 tempers of the hammer type, havin a fluid pressure cylinder, and a tamper stee having a collared shank adapted to extend into the i c linder in position to receive the impact b ow of the hammer. The shank of the tam- 1 per steel may pass through a suitable loose bushing, usually referred to by manutacturers and users as a nozzle, formin a chuck located forwardly of the collar, and means have heretofore been provided 0 around the steel shank and between the said bushing'and this enclosing barrel nut for cushioning the shock due to the collar strikin the inner end of the bushing. his cushioning means has usually been in the. form of a spring, but such springs have been found to break and are short lived. It has furthermore been found to be practicably impossible, to make springs of suitable sizes which will continuously with-' stand the severe to which they are subjected without weakening, and injury to the machinegjhas resulted from such breakage with the attendant delays in the work. 'The primary object of the present invention is to secure a simple and efficient cushioning device which cannot break under all ordinary circumstances and will be long lived and save breakage and repairs. 1 have found that a properly constructed split 4 bushing retaining rubber buffer or buffer of similar material has many advantages oven a cushioning spring. The rubber bufi'er should be of comparatively soft pliable vulcanized rubber, rather than hard rubber to and should have appreciable elasticity. Therubber buffer is" located within the barrel nut forming the front head of the tie tainmr and a split melic buds! washer is referably arranged ween the ,buder an the to outer end of the hal nut over the openin in the end of the nut through whic the collared shank of the tamper steel passes in assembling the parts, so that said washer closes the openi, pro the v seats a. union, or srnnns, rnn'nsrnvsn'ra, sssienon no mes i A GQREOMTIGN or new a- 9, 1926. Serial No. dQBfidld.

prevents the buder from squeezing through the hole in said end.

The tie tamper front end construction and cushioning device are illustrated in one of their preferred forms in the accompanyln% drawings, in whichigure 1 is a longitudinal sectional elevation of the front end of a. machine contain-. ing the invention.

Figure 2 is a side elevation, and

Figure 3 is a detail side view of a portion of the shank of a tamper steel illustratin. the method of applying the bufier an washer to the shank.

Referring to the drawings, only so much of the front end of a fluid actuated tie tamper of the hammer type is shown which will serve to illustrate the invention. The cylinder A, of which onl the front end portion is shown, is adapte to receive the shank B of a tie tam or steel, in this instance, having a collar The shank extends through the sleeve D into position to receive the impact blows of the fluid actuated hammer E in the. usual manner.

A flanged split bushing F loosely surrounds the shank of the steel forwardly of the collar C and extends into the front end of the cylinder A. The two parts of the split bushing F are formed with a flange G in this instance bearin against the outer end of the cylinder. Su cient space is maintained between the oppowd ends of thesleeve and movement spaoe.

In accordance with this invention, a split non-metallic elastic bushing retaining rubber bufier H is lly placed over the shank of the steel forward ly of the bushing F and is adapted to bear against the flange G- of the bushing F to hold it in its rearward position in the front end of the 'c linder. In Figure 3, the rubber butler lines on the shank of the steel but is shown in dotted lines opened up sufiiciently to persplit bushing to permit limited 0' the collar and steel in said wit the shank of the steel to be placed with- Y in the buer and the elasticity of the louder is shown in position in full closes the louder about the shank of the steel.

A split metallic louder washer J of sub stantially the same diameter or slightly larger than the normal outside diameter of the louder, is placed on the shank of the. sl

' slit portion 1s provided with lu in front of the bufler, and in Figure 3 the bufier washer is shown in position on the shank in full lines, and is shown in dotted lines in the act of being placed on the shank. The split washer J is opened or forced apart as indicated in dotted lines and is thus sprung over the shank of the steel.

It is necessary that the bushin F, the rubber bushing retaining bufier and the buffer washer J all be split or divided in such manner that they may be placed over the shank of the steel, because of the fact that in a tie tamper, the tamper steel is provided with a broadened tamper end K and such parts as the bushing F, the bufler and the washer could not be conveniently or practically constructed to be placed over the shank of the steel from either end. A barrel nut L forming the front head of the tie tamper encloses the buffer and washer as illustrated particularly in Figure 1, and ex-,

tends over the front end of the cylinder A. The outer end 0 of the barrel nut is provided with an aperture P of suflicient size to permit the entrance of the collar (3 of the steel and the buffer washer J between the buffer H and the end 0 of the barrel nut closes this opening when the parts are assembled, protects the'bufler. prevents the buffer from becoming distorted and damaged by shock and pressure which would otherwise tend to force the material of the buffer through the aperture P.

A portion of the body of the barrel nut L is preferably slotted or slit at Q and this i R adapted to receive the tightening bolt having the nuts T and locldng washer U. The barrel nut is preferably threaded onto the outer.

end of the c linder A by means of the screw threads and suitable means may be provided for retaining or locking the barrel nut in position after it is tightened, in this instance the inner edge of the barrel nut being provided with grooves or notches W adapted to receive the bent and X of a coiled spring Y the other bent end Z of which enters the notch a in the flange b on the cylinder A.

After the parts are assembled and the barrel nut L is adjusted and tightened and retained in position, the shock of the collar C upon the inner end of the bushing F is cushioned by the bushing retainin rubber buffer H which has a double function of a cushion and a retaining device. The split bufl'er washer J also has the double function of a retaining and protective device. This cushioning device has been found to operate satisfactorily and well, prolongs the life of the parts and does not need to be renewed except in occasional instances.

1 claim:

1. A fluid actuated tie tamper of the hammer type, having a fluidpressure cylinmeme.

der, a tamper steel having a collared shank adapted to extend into the cylinder in position to receive the impact blows of the hammer, a split bushing loosely surrounding the shank of the steel forwardly of said collar and extending loosely into the front end of the cylinder, a sleeve surrounding the steel and extending into the cylinder rearwardly of said collar, whereby the collar on the steel'has limited movement between said split bushing and sleeve, a split loushin retaining elastic bufler loosely mounted on the shank of the steel forwardly of said bushing yieldingly holding the split bushing in -1ts rearmost position in the front end of the cylinder, a split metallic bufi'er washer in front of the said bufl'er, a barrel nut enclosing said buffer and washer and extending over the front end of the cylinder, and means for retaining said barrel nut in position on the cylinder.

2. A fluid actuated tie tamper of the hammer type, having a fluid pressure cylinder, a tie tamper steel having a collared shank adapted to extend into the cylinder, in position to receive the impact blows of the hammer, a flanged split bushing loosely sur-.

roundin the shank ofthe steel forwardly of said "collar and extending loosely into the front end of the cylinder, the bushing flange bearing against the outer end of the cylinder, a sleeve surounding the steel and extending into the cylinder rearwardly of said collar so that the collar cit-the steel has limited movement between the said s lit bushing and the said steel, a split bushing retaining elastic buffer'on the shank of the steel adapted to bear a inst the flange of the bushing, and yiel ingly holding the split bushing in its rearmost position in the front end of the cylinder, a split metallic bufler washer on the shank of the steel in front of the said bufl'er, a barrel nut enclosing said buffer and washer and extending over the front end of the cylinder, the said barrel nut havin an opening in its front end to permit t e entrance of the collar on the steel, and the bufler washer forming a closure for said opening when the parts are assembled, means for tighteningrthe barrel nut on the cylinder, and additional means for retaining the nut in position.

3. A fluid actuated tie tamper of the hammer type,'comprising a cylinder and reciprocating hammer piston, a sleeve within the front end of the cylinder, a tamper steel having a collared shank adapted to extend through said sleeve into the cylinder in position to receive the direct blows of impact of the hammer piston, a removable split bushin loosely surrounding the steel and locate within the cylinder wholly in front of the collar on the steel, suficient space Bit) are

I a loosely surroundin bein maintained between the opposed ends of tfie sleeve and s lit bushing to permit limited movement 0? the collar and steel in said space, a split nonmetallic elastic bufier the shank of the steel forwardl of said ushing for holding the split bus in in its rearmost position in the front end 0 the cylinder, 9. split metallic bufl'er washer in front of said elastic buffer, to a barrel nu-t enclosin said buffer and washer and extending over t e front end of the cyl- 

